Electric heater.



G. J. SCHNEIDER.

ELECTRIC HEATER.

ATION FILED NOV 10 1911 Patented Feb. 9, 1915.

GEORGE J. SCHNEIDER, OE DETROIT, MICHIG AN, ASSIGNOR TO ACME ELECTRIC HEATER COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

I ELECTRIC HEATER.

Specification of Letters Patent.

Patented Feb. 9,1915.

Application filed November 10, 1911. Serial No. 659,463.

To all whom it may concern:

Be it known that I, GEORGE J. SCHNEIDER, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented cer-' tain new and useful Improvements in Electric Heaters, of which the following is a specification, reference beinghad therein to the accompanying drawings.

.The invention relates to electric heaters and has more particular reference to the novel construction of a detachable heating unit, and the. means employed for distributing the heat'to the Work surface.

The invention consists in the construction,

as hereinafter set forth.

In the drawings,Fig-ue-1 is a perspective view of the work body and unit in assembled relation; Fig. 2 is a plan view of said parts detached; Fig. .3 is a cross section on line 0cm Fig. 1. Fig. 4 is a perspective view illustrating the construction of the unit.

' One of the objects of the invention is to obtain a construction of detachable heating be absorbed little resistance and great uniformity as possible.

A further object is to provide. terminals for the resistance element which are rigidly secured to the detachable unit and held in fixed relation to each other. I

A still further feature is the association with the unit and terminals of a guide or holding socket for the connector from the external circuit.

In detail A is the work body. which is shown as a sad-iron and the bottom face of which constitutes the work surface, B is adetachable unit comprising an insulated resistance element 0 "arranged to extend tor-- tuously between fiat protecting plates or armor The plane of the resistance element and armor plate is'transverse work surface and the body A is provided with a slot with which the armored resist' 'ance may be engaged. Thus the heatfromass directly into the body A through wh ch it is distributed and passes without obstruction to the work surface. a

To obtain the most advantageous distribution of the heat to a work surface of the form of an ordinary sad-iron, the unit B both sides of the resistance will terminal from the opposite is in condition to that of the I is of triangular form! The two sides of this 7 triangular unit extend from the apex of the iron toward the rear end thereof, thereby distributing the heat through a progressively increasing cross section of the body. This will result in giving a hot point and will avoid overheatin in the central portion of the work suriace, which is a common defect in electrically heated sad-irons.

The rear side of the triangle is occupied by the terminal connections and the guide or socket for the connector. As. shown, the armor plates D extend around the rear side and are then fashioned into cylindrical form to receivethe terminal contact E. This contact is in electrical connection with the resistance element but is insulated from the armor and resistance in alinement with the side. To hold the terminals rigidly in thisposition and with a suitable insulating air space. between their ends, a socket or guide member F is arranged to form a rigid mechanical connector. As shown, this socket F has cylindrical extensions G which surround the contacts E and their supporting portions of the armor D are clamped to form a rigid connection.

With the construction as described in use, the unit may be readily inserted or withdrawn from the slots H in the body A and when in engagement will be held with the socket F and the contacts E in a predetermined position. covered by a suitablehood (not shown) and for use. Whenever it is necessary or desirable to renew the unit it may be quickly As shown in Fig. 3, the heat generated in the resistance will pass without obstruction and equally from both sides into the body where it is conducted without further break in-molecular contact to the heat distributing surface. Practical tests have demonstrated that with this arrangement the heat may be distributed with less loss than where the unit is arranged with its flat side parallel to the heat distributing surface The reason for this will it is considered that the heat generated'can only flow by conduction through the body at a lower temperature than that of the unit itself. Thus if the unit is parallel with the work surface detached from the slots H,- the new unit substituted therefor.

be apparent when- The body may then be l the heat from one side only .ilo

can 1 ss directly to said surface by con.- duction, while the heat distributed from the opposite surface of the unit must flow in the opposite direction. Inasmuch as the unit is normally at a higher temperature than the heat distributing body, the heat conductedina direction away. from the work surface will not return as it cannot pass through a unit of higher temperature.

What I claim as my invention is:

'1. In an electric heater, a detachable heating unit having spaced: terminal contact members permanently secured thereto,

. nently'fixed relation thereto,

and a guide for the connector with the ex-.

ternal circuit, mechanically coupling said.

contacts and holding the same-in permain, detachable as a unitary structure with the heating unit.

2.1n an electric heater, a detachable heating unit comprising an. armored resistance element, terminal contacts permanently secured to opposite ends of said ele- 'ment' having. portions in ment and arranged in proximity toeach other, and a mechanlcal' coupling. between said: contacts. forming a guide forthe connector, With the external. circuit, said guidebeingdetachableas a unitary structure with the heating unit;

3; In an. electric heater, a. detachable heating unit comprising a. flat resistance elediiferent planes, an insulated armor forsaid resistance, terminal contacts connected to the portions of said resistance in difi'erent planes, and" a 'mechanical connection betweenthe armor of the different. portions: ofsaid. resistance colitactsand holding the same in fixed relaholding said terminal contacts in fixed relation to :each other.

4:- In an electric-heater,

mg unit comprising an armored resistance element having. portions in different planes, terminal contacts permanently secured to said portions, andia mechanical connectionbetween and carriedby said portions forming an inclosui'g. socket for sa1d terminal tion to each other.

it is evident that said guide besurface and in divergent planes,

a detachable heat 5, In an electric ing un t comprising an armored res stance element, a terminal contact connected with said element, and a socket secured to the armor. of said element nal contact and forming a guide for the connector with the external circuit.

6. In an electric heater, the combination of aheatdistributing. body having a work surface, and slots in the opposite surface thereof in divergent planes transverse to that-ofthe work surface, and aheating elcment having portions detachably engaging said divergent: slots, andtergninals at the divergent ends of-said element rigidly se..

able as anentirety from said slot.

8-, In an electric-heater, the combination with an. integral heat distributing body having a: work surface and provided with slots arranged=transverseto the plane of the work armored-heating element ha g: portionsm divergent planes engaging-said slots with its opposite. flat faces in. heat-conducting con.- tact with the Walls. of the slots, and. plugengaging contactsfixedly connected to the heater, a detachable heatinclosingsaid term1- l the walls of the slot, and I resistor and forming therewith a unitary structure, said heating-element being. detach, able as: an entirety from: said slots.

In testimony whereof I aifix my'signature 9 0 in presence of two witnesses.

'enoncn J; sonnninnn;

Witnesses:

W. J. BELKNAP, JAMES P; Bauer. 

